Messer Griesheim GmbH

Fire Polishing of GlassMesser offers an alternative to acid polishingMesser offers an environmentally friendly and financially viable alternative to acid polishing of glass in the form of fire polishing using custom designed oxygen burners.

This technique is easy to integrate into the existing process while being suitable for use with all glass types.

Glass has been used by mankind for many years. It is a versatile raw material that can be moulded into practically any shape and is also so far more resistant too chemicals than most other substances. It is the perfect material for the preservation of foodstuff. Besides the ease of moulding, it is also easy to decorate and color it.

As a result it is also highly suitable for the manufacture of decorative items. These stretch from the production of high quality champagne bottles and wine glasses, decorative perfume bottles right through to vases and statues made gracefully crafted glass. Such articles must have an absolutely perfect surface as even the smallest imperfection will spoil the overall impression of the object. These high quality demands can only be achieved by means of polishing. The use of acid polishing is a common practice to achieve these goals. However, its use results in an additional process step as well as a hazard to both staff and the environment. The disposal costs of this waste acid are also rising continuously. Fire polishing is an alternative to acid polishing. Its most important advantages are:
·no disposal of waste products
·can be integrated into the forming section
·environmentally friendly and reduced health risks

With fire polishing the surface or edge of an already moulded glass shape is remelted using a small burner. This is performed on a carousel directly coupled to the moulding step (which could be a mechanical press, blowing or centrifugal casting). Here the glass is still hot but no longer malleable.

Through the rapid melting of the glass surface, defects like white beads, tool marks and streaks as well as small breakages and sharp edges are smoothed out without thermally stressing the structure. Only a very thin layer is melted, which solidifies just as rapidly again. The result is an immaculate and brilliant surface.

Small oxy-fuel burners are particularly well suited to heating small precisely defined surfaces to a high temperature in a short space of time. They make it possible to heat a specific part of the glass surface without heating the entire structure and thereby damaging it. Messer manufactures a large part of different types of burners that are capable of coping with a broad spectrum of applications. The primary characteristic of these burners is their layout, size and version can however also be adapted to suit the individual requirements.

There are burners with internal and outside mixing. In the first type of burner the fuel gas and oxygen are premixed within an internal mixing zone prior to being ignited at the burner head. Premixed burners, type “Griflam” of Messer Cutting and Welding have been successfully used in the glass industry especially in the field of quartz glass treatment for many years.
Outside burners have been developed in recent years. Both the fuel gas and the oxygen are lead to the front exit plate on the burner head through separate holes. The mixing of the two gas streams therefore occurs outside the burner. The newly introduced model that was developed by our co-operation partner is producing excellent results. Crystal and lead crystal glass in particular have shown an immaculate surface, no damage to the sharp edges of decorations and a high brilliance.

Further informations:
Berit Franz
Corporate Communications/Customer Information
Fütingsweg 34
D-47805 Krefeld
Tel.: + 49 - 21 51 / 379-9700
Fax: + 49 - 21 51 / 379-9116

600450 Messer Griesheim GmbH
Date: 28 September 2002
Source: Messer Griesheim

See more news about:

Others also read

Apogee Enterprises Inc. reported level sales but an increase in earnings for the third quarter of its fiscal 2003. Bloomington-based Apogee, which makes glass products and services, said the earnings increase was mainly the result of improvements in its architectural glass business.
William A. Wulfsohn, vice president and general manager of Nylon System for Honeywell International, has been named vice president of European coatings for PPG Industries (NYSE:PPG) and managing director of PPG Europe. "Bill will play a vital role in helping our European coatings businesses achieve their full potential," said Michael A.
Bystronic is to take over Armatec Vierhaus GmbH with effect from 1 January 2003. For Bystronic, a global supplier of system solutions for the manufacture of architectural and automotive glass, the takeover of Armatec, which specialises in laminated safety glass and handling systems, ideally complements the Bystronic portfolio.
The butterflies at Melbourne Zoo have gone upmarket with a new accommodation wing featuring Pilkington glass.
Owens-Brockway Glass Container Inc., an indirect wholly-owned subsidiary of Owens-Illinois, Inc., (NYSE: OI) announced today that is has closed on the sale of $175 million principal amount of its 8-3/4% Senior Secured Notes due November 15, 2012.
UCB reached an agreement with Solutia to acquire Solutia's Resins, Additives & Adhesives activity for $500 million, plus a $10 million exclusivity fee.

Add new comment